How to ground? What are the precautions for grounding? Create treasure anti-static for you to answer doubts
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(2)Before hanging the grounding line, electric power must be inspected first. The untested electric grounding wire is the more common habitual violation in the grassroots. The purpose of the inspection is to confirm whether the power has been cut off at the site and can eliminate the power failure and power failure. Human error, to prevent live grounding.
(3) Hang the grounding wire at the two ends of the work section, or there may be a branch line for incoming calls (including inductive power and self-provided power that may be reversed). In practical work, we often ignore the possibility of users sending electricity back and inducing electricity. There are many examples of this.
(4) When the grounding pile is used, the surface layer with strong adhesion, organic matter, and moisture should be selected to avoid overly loose, hard weathered, backfilled soil and dry ground surface in order to reduce the earth resistance of the grounding circuit. And contact resistance, can quickly clear the reason why the large current, to ensure grounding quality.
(5) It is not allowed to hang the grounding wire on the wire or metal pipe of the line. The grounding resistance is unstable, often too large, does not meet the technical requirements, and may cause the metal tube to be charged, causing harm to others.
(6) Care for the ground wire. The grounding wire is not allowed to twist the flowers during the process. When not in use, the soft copper wire should be well-grounded. After the grounding wire is dismantled, it must not be dropped from the air or thrown anywhere, and it must be transmitted by ropes. The cleaning of the grounding wire is very important to prevent sediment and debris from entering the pores of the grounding device and affecting the normal parts.
(7) The new staff must be trained and studied for the grounding line. After passing the assessment, they can only perform the grounding line operation or work.
(8) According to different voltage levels select the corresponding specifications of the ground wire. This is also a point where habitual violations are likely to occur in the precautions of the grounding wire. The wire diameter of the ground wire must be matched with the voltage level of the electrical equipment in order to pass the high current of the cause.
(9) Do not clamp the grounding cable to a metal frame or metal plate that has been painted on the surface. This is a common violation in the grounding of electrical grounding equipment. Although the metal is connected to the grounding system, the paint surface is an insulator, and the paint thickness is as high as 10 kV/mm, which can make the ground circuit unusable and lose its protective effect.
(10) It is forbidden to use this metal wire instead of the ground wire. The metal wire does not have the ability to cause large current through the cause, and the contact is not strong. The fault current will quickly melt the metal wire, disconnect the grounding circuit, and endanger the life safety of the workers.
(11) It is not allowed to hang the grounding wire or change the location of the grounding wire without authorization. The number of grounding conductors and the attachment points are all carefully considered before the work is done. To reduce or change the grounding point will reduce the on-site protection and put people in dangerous working conditions.
(12) The grounding wire has a double-sided nature and it has a safe function, but if it is used improperly, it will also have a destructive effect. At this point, the grounding wire must be removed in time. With a grounding wire combination switch will damage the electrical equipment and damage the stability of the power grid, it will lead to serious vicious electrical matters.
(13) The grounding wire should be stored in a dry room. It must be kept in a designated place, stored, maintained, numbered, and checked regularly. Should pay attention to the quality of the grounding line inspection, observe the appearance of corrosion, wear, excessive oxidation, aging and other phenomena, to avoid affecting the use of the ground wire.